MIC2204

Features:

`Input voltage range: 2.3V to 5.5V
`Output down to 1V/ 600mA
`2MHz PWM operation
`Ultra-fast transient response (typical 200kHz GBW)
`Internal compensation
`All ceramic capacitors
`>95% efficiency
`Fully integrated MOSFET switches
`Easily synchronized to external clock
`SYNCLOCK feature to daisy-chain multiple 2204s
`<340?A quiescent current
`Logic controlled micropower shutdown
`Thermal shutdown and current limit protection
`10-pin MSOP and 3mm*3mm MLF^TM-10L
`-40 to +125 junction temperature range




Application

·High-efficiency portable power
·Cellular phones
·PDAs
·802.11 WLAN power supplies
·RF power supplies
·Li Ion battery powered applications




Pinout






Specifications

Supply Voltage (V_IN ).....................................................6V
Output Switch Voltage (V_SW).........................................6V
Logic Input Voltage (V_EN, V_{SYNC_IN} )..........V_IN to (R)0.3V
Power Dissipation⁽²⁾
Storage Temperature (T_S ).......................-65 to +150





Description

The Micrel MIC2204 is a high-efficiency, 2MHz PWM syn- chronous buck switching regulator. Power conversion effi-
ciency of above 95% is easily obtainable over a wide range of applications. A proprietary internal compensation tech- nique ensures stability with the smallest possible inductor and ceramic output capacitor.

The MIC2204 operates from 2.3V to 5.5V input and features internal power MOSFETs that can supply over 600mA of
output current with output voltages down to 1V. The MIC2204 implements a constant 2MHz pulse-width-modulation (PWM) control scheme which reduces spurious noise in sensitive RF and communication applications. Additionally, it can be synchronized to an external clock, or multiple MIC2204s can easily be daisy-chained with the SYNCLOCK feature.

The MIC2204 has a high bandwidth loop (typ. 200kHz) which allows ultra-fast transient response times. This is very useful when powering applications that require fast dynamic re- sponses, such as the CPU cores and RF circuitry in high- performance cellular phones and PDAs.

The MIC2204 is available in 10-pin MSOP and 3mm *3mm MLF^TM-10L package options with an operating junction tem- perature range from -40 to 125 .